Band-saw.



W. B. HEYER.

BAND SAW.

APPLICATION FILED JULY 7, 1009 97 8,374, Patented Dec. 13, 1910.

W. B. HEYER.

BAND SAW. APPLIUATION FILED JULY 7, 1909.

978,374. Patented Dec. 13, 1910.

2 SHEETS-SHEET 2.

WILLIAM B. HEYER, OF NEWPORT, VERMONT.

BAND-SAW.

Specification of Letters Patent.

Patented Dec. 13, 1910;

Application filed July 7, 1909. Serial No. 506,850.

To all whom it may concern:

Be it known that I, IVILLIAM B. I'IEYER, a citizen of the United States,residing at Newport, in the county of Orleans and State of Vermont, haveinvented a new and useful Band-Saw, of which the following is aspecification.

This invention relates to wood sawing, and more especially to band sawmachines; and its object is to improve the tension device therein.

To this end the invention consists broadly of a single beam supportingboth saw pulleys and the tension device, whereby the beam may be mountedso as to swing and cause the saw blade to move through the path desired;and the invention consists specifically in the connection between thetension device and the bearing of one pulley and in the means forpermitting the removal of said connection without the detachment ofother parts all as more fully described below.

' In the drawings, Figure 1 is a side elevation of an apparatusembodying my present invention and showing the band saw disposed tooperate in a horizontal plane. Fig. 2 is a similar view showing the sawarranged to operate in a vertical plane. Fig. 3 is an end elevation.Fig. 4 is a front end elevation, and Fig. 5 is a detail perspective viewof the saw tension device.

The supporting frame of the machine comprises a base plate 1, and a pairof braces 2 disposed at one end of the base plate and extending upwardtherefrom in an oblique position, and supported on short posts 3 risingfrom the base plate near the end of the same, as clearly shown. At anintermediate point of the base plate, a standard 4 is erected so as tofurnish an additional support for the saw-carrying frame when the sameis in its lowered position. At the upper ends of the braces 2, I securejournal boxes 5 in which the driving shaft 6 is mounted, as clearlyshown, and upon one end of the said driving shaft a band pulley 7 may besecured in order to impart power to the said driving shaft from anyconvenient motor. In the drawings, I have illustrated a driving beltrunning from the band pulley to a point below the floor of the room inwhich the sawing apparatus is placed. The driving shaft 6 passes throughthe side bars 8, of a rectangular frame forming a part of the carryingframe for the saw.

This eud frame is loosely fitted upon the driving shaft so that it maybe swung upon the said shaft as a pivotal center, and across the upperside of the said frame a beam 9 is secured and projects forward adistance necessary for the proper support of the saw to be used. Braces10 are secured to the lower end of the end frame 8 and to the beam 9 soas to impart the proper strength and rigidity to the structure, and thesaid beam when in its lowered position is arranged to rest upon theupper end of the standard 4, as clearly shown in Fig. 1. At about thecenter of the beam 9 a depending guide 11 is secured having its lowerend suitably shaped to fit over the saw band 12 and thereby preventlateral swaying or bending of the saw.

A beveled pinion 13 is secured upon the driving shaft 6 and meshes witha similar pinion 14 which is secured to the upper end of a shaft 15mounted in the lower bar of the end frame 8, and having a saw carryingpulley 16 on its lower end. The saw 12 passes around this pulley 1.6 andalso around a similar pulley 17 which is carried by the outer free endof the beam 9, and is capable of adjustment so that the saw will be heldin the proper frictional engagement with both pulleys 16 and 17 so as tobe set in motion by the rotation of the said pulleys. The pulley 17 issecured on a stub shaft 18 which is journaled in a box 19 secured to thelower end of an arm 20 which is pivotally secured to a depending post 21near the lower end of the same, the said post being disposed at or nearthe outer end of a plate 22 which is slidably secured to the under sideof the beam 9 at the outer end of the same. The beam and the plate haveregistering notches 91 and 92 opening through their outer ends, andalongside the notch 91 in the beam are upright ears 98. A bracket 23 issecured to the outer side of the post 21, and an adjust.- ing screw 24is mounted in the end of the said bracket and bears against the arm 20near the upper end of the same so that by adj ust-ing the said screw 24the arm 20 may be turned on its pivot to properly adjust the saw pulley17. The post 21 is connected with the plate 22 by a brace 25 so as toprevent bending or yielding of the said post under the straintransmitted thereto from the saw, and near its upper end the post isconnected by means of an adjusting screw 26 with a compensating lever 27which extends through the notches 91, 92 and on a pin 9 1 through saidears 93 is journaled upon the upper side of the beam 9 at the outer endof the same, and projects upward. Hence by disengaging the pin 94: fromthe ears 93 and disconnecting the ends of the lever, it can be removedfrom the notches without detaching the plate or other parts from thebeam. A cable 28 is attached to the upper end of the lever 27 andextends rearward therefrom over a pulley or roller 29 at the upper endof a bracket or arm 30 rising from the beam 9, and a counter weight 31is attached to the end of the said cable so as to hold the same taut andmaintain the lever 27 in its proper position thereby keeping the sawunder tension.

From the foregoing description, taken in connection with theaccompanying drawings, it is thought the operation and advantages of myimproved band sawing machine will be readily appreciated. The logs orblocks to be cut up are fed to the machine over any convenient orsuitable table or carriage, and power is imparted to the saw through theband pulley 7 and driving shaft (3 with the meshing pinions 13 and let,as before stated, and as will be readily understood. The pulley 16 willthus be set in motion, and the saw 12 bearing against the edge of thesaid pulley will be moved therewith through the frictional contact. Itwill be observed that the machine may be turned into a verticalposition, as shown in Fig. 2 or may be swung on the driving shaft as acenter so as to assume a horizontal position, as shown in Fig. 1, andthis swinging adaptability of the apparatus permits it to automaticallyfeed or follow the cut through the log being acted upon, it beingunderstood that the saw carrying frame may be raised to any positionbetween the horizontal and the vertical, so that the edge of the sawwill rest against the block or log, and the weight of the said framewill then force the saw through the block as the same is cut. It willalso be noted that the teeth of the saw are arranged on the under sideof the same when in the horizontal position so that the danger ofaccident through persons falling upon the saw is reduced. The counterweight 31 acting upon the compensating lever 27 will serve to hold thesaw to its work and resist the tendency of the same to buckle orstretch, inasmuch as the tendency of the counter weight will be to drawthe upper end of the said lever rearward and consequently swing thelower end of the same outward thereby pulling the adjusting frameconsisting of the post 21 and the plate 22 outward toward the free endof the beam 9, consequently moving the arm 20, and the pulley 17 carriedby the lower end thereof, away from the pulley 16 so as to hold the sawtaut at all times.

Having thus described my invention, what I claim is:

In a band sawing machine, the combination with a normally horizontalbeam having a notch opening out one end, ears at opposite sides thereof,an upright rotary shaft at its other end, a saw pulley carried by theshaft, a plate slidably mounted beneath and having a notch registeringwith that in the beam, a post depending rigidly from the plate, a boxbelow the post, a stub shaft journaled therein, a saw pulley on saidshaft, a band saw connecting the pulleys, and means for adjusting theboX with relation to the post; of a lever extending through saidregistering notches, a pin through the lever and journaled in said ears,adjustable connections between the lower end of the lever and said post,and tension devices supported by the beam and connected with the upperend of the lever.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

WILLIAM B. HEYER.

lVitnesses S. W. KEITH, H. C. ALLBEE.

